Manual sync and auxiliary matcher are not working for some catalogues

https://mix-n-match.toolforge.org/#/catalog/5041 is already populated for hundred of thousands of objects, but nor manual sync, nor Auxiliary matcher for some reason can’t see these values and are not syncing them with WD. If you try to link any entry manually, nothing new is added to the WD, but the MnM entity becomes linked to WD.